Tag: neural tissues

Questions Related to neural tissues

Myelin sheath of nerve fibres is produced by

biology animal tissues, morphology and anatomy of cockroach types of neuron nervous tissue neural tissues

  1. Axon

  2. Connective tissue

  3. Schwann cells

  4. Neuroglia

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Correct Option: C
Explanation:
  • Myelin is a layered substance made of phospholipid, cholesterol and protein that covers the axons of the neurons.
  • It insulates the nerve impulses from the surrounding nerve fibres. 
  • It also increases the speed of impulses through nerve axons.
  • It is formed in the central nervous system by glial cells called the oligodendrocytes.
  • Whereas, in the peripheral nervous system they are produced by Schwann cells.
  • So, the correct answer is 'Schwann cells'.

Myelin sheath has layers of fat and protein

biology animal tissues, morphology and anatomy of cockroach types of neuron nervous tissue neural tissues

  1. Upto 100

  2. 10-20

  3. Two each

  4. One each

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Correct Option: A
Explanation:

  • Myelin is an insulating layer or sheath that forms around nerves, including those in the brain and spinal cord.
  •  It is made up of protein and fatty substances. 
  • This myelin sheath allows electrical impulses to transmit quickly and efficiently along the nerve cells.
  •  If myelin is damaged, these impulses slow down. Hence, the Myelin sheath has layers of fat and protein up to 100.
So, the correct answer is 'up to 100'.

The characteristic of a nerve cell that relates directly to its function is its-

biology animal tissues, morphology and anatomy of cockroach types of neuron nervous tissue neural tissues

  1. Long extensions.

  2. Flat shape.

  3. Ability to change shape.

  4. Ability to engulf bacteria.

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Correct Option: A

Bipolar neurons are present in the

biology animal tissues, morphology and anatomy of cockroach types of neuron nervous tissue neural tissues

  1. Retina of eyes

  2. Olfactory epithelium

  3. Spinal ganglia at embryonic stage

  4. All of the above

Show answer
Correct Option: D
Explanation:

Bipolar neurons are specialised neurons that have two cytoplasmic extensions. Out of which one serves as an axon and other serves as a dendrite both having similar branches. They function in sight, hearing, tasting, etc. They are located in the retina of the eyes, the roof of the nasal cavity, inner ear. 

So, the correct answer is option D.